When is Invention Date established?

This can be the date on which the:

  • patent application was filed; 
  • inventor can prove he/she thought of the invention and makes diligent efforts to file a patent application, build or test it; or
  • invention was reduced to practice, meaning the inventor built a model and tested it in the United States, a North American Free Trade Agreement (NAFTA) or World Trade Organization (WTO) member country.

 

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